Fundamentals of Mathematics, 2008a

356 CHAPTER 6. DECIMALS
841.0056
47.016
+19.058
To insure that the columns align properly, we can write a 0 in the position at the end of the numbers
47.016 and 19.058 without changing their values.
Example 6.24
1.314 − 0.58
1.314
−0.58 Write a 0 in the thousandths position.
Example 6.25
16.01 − 7.053
16.01
−7.053 Write a 0 in the thousandths position.
Example 6.26
Find the sum of 6.88106 and 3.5219 and round it to three decimal places.
6.88106
+3.5219 Write a 0 in the ten thousandths position.
We need to round the sum to the thousandths position. Since the digit in the position immediately
to the right is 9, and 9>5, we get
10.403
Example 6.27
Wendy has $643.12 in her checking account. She writes a check for $16.92. How much is her new
account balance?
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